Air Diffuser Stone AS-300C Dimension: 1.8" x 12" Connection: 1/2". 1/2" & 1" air tubing                        1.5" PVC Fitting
Extremely durable and washable (reusable) air diffusing media
Manufactured with brown Adamantine Spar (corundum/alumina) under ultra high temperature and pressure
Applicable in Acidic or Alkaline waters (low or high pH)
Ozone resistant
Suitable for aquarium, koi pond, fish hatchery and aquaculture applications